package com.jintoufs.web.action.common;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.jintoufs.web.action.support.SupportAction;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;

/**
 * Created by Zhao Kai on 2016/3/16.
 */
@Controller
@RequestMapping("/code")
public class CaptchaImageCreateController extends SupportAction {

	private Producer captchaProducer = null;

	@Autowired
	public void setCaptchaProducer(Producer captchaProducer) {
		this.captchaProducer = captchaProducer;
	}

	@RequestMapping("/captcha-image")
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {

		String code = (String) request.getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY);
		System.out.println("验证码: " + code);
		response.setDateHeader("Expires", 0);
		response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		response.setHeader("Pragma", "no-cache");
		response.setContentType("image/jpeg");
		String capText = captchaProducer.createText();
		request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
		BufferedImage bi = captchaProducer.createImage(capText);
		ServletOutputStream out = response.getOutputStream();

		ImageIO.write(bi, "jpg", out);
		try {
			out.flush();
		} finally {
			out.close();
		}
		return null;
	}

}